> ## Documentation Index
> Fetch the complete documentation index at: https://docs.uplift.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Loss of Posture

> Binary indicator if the golfer loses spine posture during the swing, flagged when the mid-shoulder or mid-pelvis position shifts more than 10 cm (~4 in) from its Address position between Address and Impact.

## Technical Details

* **Variable Type:** Movement Flag
* **Data Type:** Integer
* **Units:** N/A
* **Column Name:** `loss_of_posture`
* **Related Column Names:** `loss_of_posture_shoulder`, `loss_of_posture_pelvis`
* **Optimal Direction:** Lower is better
* **Unknown Value:** -1
* **Measurement:** Mid-shoulder and mid-pelvis 3D position between P1 Address and P7 Impact
* **Threshold:** Mid-shoulder or mid-pelvis position moves more than 10 cm (0.1 m) from its Address value, in any axis

## Description

Loss of Posture flags when the golfer's spine angle changes significantly during the swing, identified by excessive displacement of the mid-shoulder or mid-pelvis position relative to Address. Related outputs break this down further: Loss of Posture Shoulder and Loss of Posture Pelvis report the shoulder- and pelvis-specific components, and Loss of Posture Shoulder Direction / Loss of Posture Pelvis Direction report which axes triggered the flag. Early Extension and Reverse Spine Angle are related, more specific posture faults.

## Use Cases

* Posture fault detection
* Swing consistency coaching
* Injury risk screening